AVT732 B. Whisper - Whisper Hunter
Kugwira ntchito kwadongosolo kumapangitsa chidwi chodabwitsa kwa wogwiritsa ntchito. Kunong'ona kwachete komanso maphokoso osamveka bwino amakulitsidwa kuti mumve zambiri mosaiwalika.
Derali ndilabwino pazoyeserera zosiyanasiyana zokhudzana ndi kukulitsa mawu osiyanasiyana. Izi zitha kukhala zothandiza kwa anthu omwe ali ndi vuto lakumva pang'ono, komanso ndi njira yabwino yowunika kugona kwa ana aang'ono. Idzayamikiridwanso ndi anthu okonda kulankhulana ndi chilengedwe.
Kufotokozera kamangidwe
Chizindikiro chochokera ku maikolofoni ya M1 electret chimadyetsedwa mpaka gawo loyamba - amplifier osalowetsa ndi IS1A. Kupindula kumakhala kosalekeza ndipo ndi 23x (27 dB) - kutsimikiziridwa ndi resistors R5, R6. Chizindikiro chodziwikiratu chimadyetsedwa ku inverting amplifier ndi IC1B kyubu - apa phindu, kapena m'malo mwake, kuchepetsedwa, kumatsimikiziridwa ndi chiŵerengero cha kukana kwamphamvu kwa potentiometers R11 ndi R9 ndipo imatha kusiyana mkati mwa 0 ... 1. Dongosololi limayendetsedwa ndi voliyumu imodzi, ndipo zinthu za R7, R8, C5 zimapanga dera lopangira nthaka. Zosefera zosefera C9, R2, C6 ndi R1, C4 zimafunikira munjira yopindulitsa kwambiri ndipo ntchito yawo ndikuletsa kudzikonda komwe kumadza chifukwa cha kulowa kwa siginecha kudzera mumayendedwe amagetsi.
Kumapeto kwa njanji, chokulitsa mphamvu cha TDA2 IC7050 chidagwiritsidwa ntchito. M'makina ogwiritsira ntchito, imagwira ntchito ngati amplifier yanjira ziwiri ndi phindu la 20 × (26 dB).
Chithunzi 1. Chithunzi chojambula
Kuyika ndi kusintha
Chithunzi chozungulira ndi maonekedwe a PCB akuwonetsedwa mu Zithunzi 1 ndi 2. Zigawozo ziyenera kugulitsidwa ku PCB, makamaka mwa dongosolo lomwe likuwonetsedwa mu mndandanda wa zigawo. Mukasonkhanitsa, muyenera kusamala kwambiri ndi njira yogulitsira zinthu zamtengo: electrolytic capacitors, transistor, diode. The cutout pa nkhani ya choyimilira ndi dera Integrated ayenera kugwirizana ndi chojambula pa bolodi losindikizidwa dera.
Maikolofoni ya electret imatha kulumikizidwa ndi mawaya amfupi (ngakhale okhala ndi malekezero odulira), kapena ndi waya wautali. Mulimonsemo, tcherani khutu ku polarity yolembedwa pa chithunzi ndi bolodi - mu maikolofoni, mapeto olakwika akugwirizana ndi chitsulo.
Pambuyo posonkhanitsa dongosolo, m'pofunika kufufuza mosamala kwambiri ngati zinthuzo zinagulitsidwa molakwika kapena m'malo olakwika, ngati malo a soldering anatsekedwa panthawi ya soldering.
Mukayang'ana msonkhano wolondola, mutha kulumikiza mahedifoni ndi gwero lamagetsi. Zosonkhanitsidwa mosalakwitsa kuchokera kuzinthu zogwirira ntchito, amplifier idzagwira ntchito nthawi yomweyo. Choyamba tembenuzani potentiometer kukhala osachepera, i.e. kumanzere, ndiyeno pang'onopang'ono muwonjezere voliyumu. Kupindula kwakukulu kumayambitsa kudzidzidzimutsa (panjira mahedifoni - maikolofoni) ndi zosasangalatsa kwambiri, phokoso lalikulu.
Dongosololi liyeneranso kuyendetsedwa ndi zala zinayi za AA kapena AAA. Itha kuyendetsedwanso ndi 4,5V mpaka 6V plug-in magetsi.
